منابع
1- Akram Ghaderi, F. 2001. Effects of planting date on phonology and morphology, yield and yield components of three cotton cultivars in Gorgan. M.Sc. thesis, Faculty of Agriculture, Gorgan University of Agricultural Sciences. (In Persian with English summary)
2- Akram Ghaderi, F. Latifi, N. and Rezaei, J. 2002. Effects of planting date on yield and yield components of three cotton cultivars. Journal of Agricultural Sciences and Natural Resources, 9(2): 81-93. (In Persian with English summary)
3- Ashokkumar, K. 2011. Morphological Diversity and per se Performance in Upland Cotton (Gossypium hirsutum L.). Journal of Agricultural Science, 3(2): 107-113.
4- Boquet, D.J. 2015. Cotton in ultra-narrow row spacing: Plant density and nitrogen fertilizer rates. Agronomy Journal, 97: 279–287.
5- Brodrick, R. Bange, M.P. Millroy, S.P. and Hammer. G.L. 2013. Physiological determinants of high yielding ultra-narrow row cotton: Canopy development and radiation use efficiency. Field Crops Research, 148: 86–94.
6- Copur, O. 2006. Determination of yield and yield components of some cotton cultivars in semi-arid conditions. Pakistan Journal of Biological Sciences, 9(14): 2572-2578.
7- Ehsan, F, Ali, A. Nadeem, M.A. Tahir, M. and Majeed, A. 2008. Comparative yield performance of new cultivars of cotton (Gossypium hirsutum L.). Pakistan Journal of life and Social Sciences, 6(1): 1-3.
8- Gardner, F.P. Pearce, R.B. and Mitchell, R.L. 1988. Physiology of Crop Plants. Blackwell Scientific Publications, Oxford, U.K.
9- Ghajari, A. and Akram ghaderi, F. 2006. Influence of row spacing and population density on yield and Yield components of three cotton cultivars in Gorgan. Journal of Agricultural Sciences, 12(4): 833-844. (In Persian with English summary)
10- Jost, P.H. and Cothren, J.T. 2010. Growth and yield comparisons of cotton planted in conventional and ultra – narrow row spacing. Crop Sciences, 40: 430-435.
11- Koocheki, A. 2004. Crop Production in Dry Regions. Jihad Daneshgahi Publications, Mashhad, Iran. 202 Pp. (In Persian)
12- Ministry of Agriculture Jihad. 2016. Report of crops statistics. Department of programming and economic. Information and communication technology center. (In Persian)
13- Naseri, F. 1995. Cotton. Astan-e-Ghods Razavi Publications, Mashhad, Iran. 902 Pp. (In Persian)
14- Panjeh koob, A. Galeshi, S. Zeinali, E. and Ghajari, A. 2007. Effect of planting date and plant density on morphological characteristics of cotton (Gossypium hirsutum cv. Siokra). Journal of Agricultural Sciences and Natural Recourses, 14(5):1-11. (In Persian with English summary)
15- Ray, L.L. Wendt, C.W. Rark, B. and Quisenberry, J.E. 1974. Genetic modification of cotton plants for more efficient water use. Agricultural Meteorology, 14(Issues 1-2): 31-38.
16- Rezaie, J. 1996. Study on effects of plant density and planting pattern on quantity and quality characteristics of cotton cultivars. M.Sc. thesis, The University of Tehran, Iran. (In Persian with English summary)
17- Seddighi, E. Ramezani Moghaddam, M.R. Sirousmehr, A.R. Esmaeilian Y. and Asgharipour, M.R. 2013. Investigating of cotton (Gossypium hirsutum L.) cultivars response to conventional-cropping system and double-cropping system after barley (Hordeum vulgar L.) in Gonabad climatic conditions. Journal of Agroecology, 5(1): 58-66. (In Persian with English summary)
18- Stephenson, D.O. Barber, L.T. and Bourland, F.M. 2015. Effect of twin-row planting pattern and plant density on cotton growth, yield, and fiber quality. Cotton Science, 15: 243-250.
19- USDA, (United States Department of Agriculture). 2014. Cotton world supply, use, and trade. Available at: www.fas.usda.gov/cotton /current.
20- Wilson, D.G. York, J.A.C. and Edmisten, K.L. 2007. Narrow-row cotton response to mepiquat chloride. Cotton Science, 11: 177-185.